351666587 has 2 divisors, whose sum is σ = 351666588. Its totient is φ = 351666586.

The previous prime is 351666583. The next prime is 351666701. The reversal of 351666587 is 785666153.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 351666587 - 2² = 351666583 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (351666583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175833293 + 175833294.

It is an arithmetic number, because the mean of its divisors is an integer number (175833294).

Almost surely, 2^351666587 is an apocalyptic number.

351666587 is a deficient number, since it is larger than the sum of its proper divisors (1).

351666587 is an equidigital number, since it uses as much as digits as its factorization.

351666587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 47.

The square root of 351666587 is about 18752.7754479170. The cubic root of 351666587 is about 705.8466678489.

It can be divided in two parts, 351666 and 587, that added together give a palindrome (352253).

The spelling of 351666587 in words is "three hundred fifty-one million, six hundred sixty-six thousand, five hundred eighty-seven".